Move coverage away from bash

[ghost]

Use new command in Travis for coverage, not the old "curl-and-bash" method.

see https://gitter.im/typelevel/cats?at=571ccb8dd47413c07dccc27c

[ghost]

This is failing as pip install is not run. I'm not sure why - perhaps as this is just a PR travis does not want to install this? The code is a straight copy from https://github.com/InTheNow/catalysts/blob/master/.travis.yml#L3-L4.

Also see https://libraries.io/pypi/codecov

[ceedubs]

@inthenow thanks! This looks like a big improvement. All of the other PR builds are currently failing as well, so I suspect this build failure isn't actually related to your change. The build logs don't exactly leave me enlightened as to what's going wrong.

To eliminate variables as we try to figure out what's going wrong with the build, we should probably hold off on merging this, but 👍 from me once we get things figured out.

Edit: I retract my statement about this failing in the same way as the other builds. I didn't notice the scripts/travis-publish.sh: line 35: codecov: command not found in the build logs. I was silly to think that @inthenow would have misdiagnosed a build failure :)

[ceedubs]

@inthenow do you think that the problem could be that we already have another install block here? I don't know yaml/travis all that well, but I'm wondering if the latter is overwriting your install block.